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12 Generac
®
Power Systems, Inc.
Section 3 – Maintenance
QUIETPACT 55, 65, and 75 Recreational Vehicle Generators
3.2 CHANGING THE ENGINE OIL
AND/OR OIL FILTER
• Change the engine oil after the first 25 hours of
operation (after the 25-hour break-in period, see
Section 2.8.5). Thereafter, change the oil every 100
operating hours. Change the oil more frequently if
operating consistently under heavy load or at high
ambient temperatures.
• Change the engine oil filter after the first 25 hours
of operation, and every 100 operating hours there-
after.
To change the oil and/or oil filter, proceed as
follows:
1. Run the engine until it is thoroughly warmed up
(at least five minutes) then shut OFF the engine.
2. With the engine still warm from running, remove
the oil drain plug (Figure 3.1). Drain the oil into
a suitable container.
Figure 3.1 — Oil Dipstick/Fill Tube and
Location of Oil Drain Plug
3. After the oil has drained, replace the oil drain
plug. (If only changing the oil, go to step 7.)
4. With the oil drained, remove the old oil filter by
turning it counterclockwise (Figure 3.2).
5. Apply a light coating of clean engine oil to the gas-
ket of the new filter.
6. Screw the new filter on by hand until its gasket
lightly contacts the oil filter adapter. Then, tight-
en the filter an additional 3/4 to one turn.
7. Remove the dipstick and fill crankcase with the
proper type and amount of recommended oil (see
Section 1.6.2). The engine crankcase can hold
about 1.8 liters or 1.9 quarts with oil filter
change. DO NOT FILL ABOVE THE “FULL”
MARK.
8. Install and tighten the dipstick before operating
the engine.
9. Start the engine and check for leaks.
Figure 3.2 — Engine Oil Filter
NOTE:
Check the oil level and fill to the “FULL” mark after
checking for leaks. The filter will retain some oil.
3.3 MAINTAINING THE ENGINE
AIR CLEANER
3.3.1 CLEANING THE FOAM PRECLEANER
Clean and re-oil the foam precleaner every three
months or every 25 hours of operation, whichever
occurs first. Service the foam precleaner more fre-
quently if operating the generator in extremely dusty
or dirty conditions. Use the following procedure
(Figure 3.3):
1. Turn the knob counterclockwise to loosen.
2. Remove the cover, foam precleaner and paper fil-
ter.
3. Remove the foam precleaner from the cover.
4. Wash the foam precleaner in liquid detergent and
water.
5. Wrap the foam precleaner in a clean cloth and
gently squeeze it dry.
6. Saturate the foam precleaner in clean engine oil.
Gently squeeze it in a clean cloth to remove
excess oil and to distribute oil (DO NOT TWIST).
7. Install the foam precleaner into the cover, fol-
lowed by the paper filter. Tabs at edges of paper
filter must lock into slots on cover.
8. Install the cover, foam precleaner and paper filter.
9. Replace knob to retain the filter in place.
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Oil Dipstick
Oil Drain Hose